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axcelenator
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Homework Statement
there is a cylindrical area in xy plane with a magnetic field (into the plane) that changes with time like that: (dB/dt)=δ
the magnetic field outside the area is 0. the radius of the cylinder is a.
we pick a string in the circle with lentgh L which is smaller than the diameter(2a). let's call the points that connect the string - A and B.
I have to find the emf between those points.
its looks like that:
http://img714.imageshack.us/img714/7092/emfk.jpg
the answer is -(Lδ/2)√[(a^2)-(L/2)^2]
please show me how can I get it. thanks
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